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Linux Kernel "fcntl_setlk()" SMP Reordered Access Vulnerability
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Secunia Advisory:
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SA30101
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Release Date:
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2008-05-07
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Popularity:
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4,795 views
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Critical:
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Not critical
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Impact:
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DoS
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| OS: | Linux Kernel 2.6.x
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| CVE reference: | CVE-2008-1669
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Description:
A vulnerability has been reported in the Linux kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
The vulnerability is caused due to an error when preventing race conditions between "fcntl_setlk()" and "close()" calls on SMP systems. This can be exploited to trigger the improper, reordered access to the file descriptor table and the "file_lock" structure of an inode, between threads running on different CPUs.
The vulnerability is reported in versions prior to 2.6.25.2.
Solution:
Update to version 2.6.25.2.
Provided and/or discovered by:
Reported by the vendor.
Original Advisory:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.2
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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